Aaron Collis, 28, of Worcester Way, Melbourn, believes the treatment is his only hope for an “offence-free future”

Chemical castration involves the administration of drugs designed to reduce libido and sexual activity.

Writing in the February edition of Inside Time, a magazine for serving prisoners, Collis said: “I am finding it nearly impossible to convince people that chemical castration is the best thing for me and it’s my best hope of an offence-free future.

“I am only speaking for myself because I know my own mind, I know my triggers and I know that the SOTP [Sex Offender Treatment Programme] alone is simply not going to lower my risk.

“I’ve spoken to doctors, nurses, psychologists, and various medical ‘experts’ about the possibility of being chemically castrated, but to no avail. I thought they would jump at the chance to take away my sex drive, but I was very wrong.

“They all seem to be trying to talk me out of it, telling me I’m young and it’s not necessary. Well, I’m sorry, but it’s my body and my messed up brain which is dangerous and this is my decision.

“I’m not going to let this go, even if I have to go to the European Court of Human Rights. I will be a free man in a few years and this is a huge factor in deciding how bright my future will be.”

Collis was jailed in 2009 and sentenced to a minimum of five years after admitting 11 counts of sexual assault. In 2012 he received a fresh five-year term after admitting further offences which brought his total number of victims to 22.

As reported in the Crow, his crimes were discovered when his neighbour, Jason Dobney, borrowed a camera that contained a video clip showing Collis abusing a young girl.

After his sentencing, Det Sgt Andrea Warren, from Cambridgeshire police, said: “Aaron Collis’ actions have caused heartache and misery for the parents of his five victims.”

Earlier this month, the Macedonian government approved measures to impose chemical castration on second-time offenders convicted of child sex abuse.

One crew and rescue vehicle from Dogsthorpe, along with two Lincolnshire crews from Stamford and Market Deeping, were called to a road traffic collision on the A1 southbound between Carpenters Lodge and Wansford.